One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(4,7)(5,9)(11,12)(13,17)(14,16)(15,18)(19,20)(21,27)(22,25)(23,26)(24,29)(28,33)(30,32)(31,34) involution — undirected(3,4,6,7)(5,10,9,8)(19,21,22,29)(20,24,25,27)(23,28,31,30)(26,32,34,33)(11,13,14,18)(12,15,16,17)(21,28)(23,31)(24,32)(26,34)(27,33)(29,30)(3,5,6,9)(4,8,7,10)(12,16)(15,17)(20,25)(21,29)(26,34)(28,30)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.